CN217984554U - Mobile generator grid-connected system - Google Patents
Mobile generator grid-connected system Download PDFInfo
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- CN217984554U CN217984554U CN202222211730.9U CN202222211730U CN217984554U CN 217984554 U CN217984554 U CN 217984554U CN 202222211730 U CN202222211730 U CN 202222211730U CN 217984554 U CN217984554 U CN 217984554U
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Abstract
The application discloses remove generator system of being incorporated into power networks includes: the system comprises a master control unit, a high-voltage line, at least one low-voltage line, at least one high-voltage mobile generator set and at least one low-voltage mobile generator set. The master control unit is connected with a high-voltage line or a low-voltage line. The high-voltage mobile generator set is connected with a high-voltage line, and the low-voltage mobile generator set is connected with a low-voltage line. The low-voltage line is connected with the high-voltage line through a transformer. The master control unit is provided with a grid-connected control cabinet, the grid-connected control cabinet is fixedly connected with the master control unit, the high-voltage mobile generator set and the low-voltage mobile generator set are fixedly provided with output control cabinets, and the grid-connected control cabinets are in wireless communication connection with the output control cabinets. The master control unit is in wireless communication connection with other mobile generator sets in the grid-connected system and can perform signal interaction with the other mobile generator sets, so that the master control unit dynamically controls the working conditions of all the mobile generator sets in the power supply system, and the stability and the reliability of the power supply system are improved.
Description
Technical Field
The application relates to the technical field of power systems, in particular to a mobile generator grid-connected system.
Background
When emergency power protection is carried out on an urban power distribution network, a traditional method is to carry out emergency power protection by adopting a power supply system formed by a mobile generator set grid-connected method with the same voltage standard. However, when a large-area fault or power failure occurs in an urban power distribution network, no matter the grid-connected system is formed by singly adopting a low-voltage generator set or singly adopting a high-voltage generator set, the power of the grid-connected system cannot meet the urban power demand.
In recent years, with the development of the requirements of power grid maintenance and network power protection, a grid-connected system formed by a grid-connected method for performing emergency power protection by using a high-voltage mobile generator set and a low-voltage mobile generator set is more and more widely used. However, the existing grid-connected system using the high-voltage mobile generator set and the low-voltage mobile generator set adopts a single machine guarantee mode, that is, one high-voltage mobile generator set or one low-voltage mobile generator set guarantees one-area power utilization, and the impact force of load change borne by the mobile generator set when the grid-connected system is adopted is poor, so that the stability and the reliability of a power supply system can be reduced. Although reducing the duty cycle can improve the stability and reliability of the power supply system, reducing the duty cycle can result in the power supply system failing to meet the power demand.
Therefore, a mobile generator grid-connected system which can meet the power demand and has high stability and reliability is urgently needed to solve the problem of large-area fault or power failure of the urban power distribution network.
SUMMERY OF THE UTILITY MODEL
In view of this, the application provides a mobile generator grid-connected system, which can dynamically adjust the output power of each mobile generator set in the system while ensuring the power supply requirement, and has higher stability and reliability.
In order to solve the technical problem, the following technical scheme is adopted:
the application provides a mobile generator grid-connected system includes: the system comprises a master control unit, a high-voltage line, at least one low-voltage line, at least one high-voltage mobile generator set and at least one low-voltage mobile generator set;
the master control unit is connected with the high-voltage line or the low-voltage line;
the high-voltage mobile generator set is connected with the high-voltage line, and the low-voltage mobile generator set is connected with the low-voltage line;
the low-voltage line is connected with the high-voltage line through a transformer;
the master control unit is provided with a grid-connected control cabinet, the grid-connected control cabinet is fixedly connected with the master control unit, the high-voltage mobile generator set and the low-voltage mobile generator set are fixedly provided with output control cabinets, and the grid-connected control cabinets are in wireless communication connection with the output control cabinets.
Optionally, the output voltage levels of the high-voltage line or the low-voltage line connected with the master control unit and the master control unit are the same.
Optionally, the grid-connected control cabinet is fixedly assembled to an electric cabin of the main control unit.
Optionally, a controller is arranged inside the grid-connected control cabinet, and the controller is fixedly connected with the grid-connected control cabinet.
Optionally, any one of the high-voltage mobile generator set and any one of the low-voltage mobile generator set are provided with communicators, the communicators are fixedly installed in the output control cabinet, and the communicators are in signal connection with the controller.
Optionally, a synchronization detection module is further arranged inside the output control cabinet, and the synchronization detection module is fixedly assembled in the output control cabinet;
and the synchronization detection module and the communicator which are positioned in the same output control cabinet are electrically connected.
Optionally, any one of the high-voltage mobile generator sets is provided with a voltage transformer, and the voltage transformer is fixedly assembled in the output control cabinet;
and the voltage transformers positioned in the same output control cabinet are electrically connected with the communicator.
Optionally, the cabinet body of the grid-connected control cabinet is an elastic telescopic cabinet body.
Compared with the prior art, the utility model provides a mobile generator system that is incorporated into power networks has realized following beneficial effect at least:
the application provides a remove generator and be incorporated into power networks system includes: the system comprises a master control unit, a high-voltage line, at least one low-voltage line, at least one high-voltage mobile generator set and at least one low-voltage mobile generator set. The master control unit is connected with a high-voltage line or a low-voltage line. The high-voltage mobile generator set is connected with a high-voltage line, and the low-voltage mobile generator set is connected with a low-voltage line. The low-voltage line is connected with the high-voltage line through a transformer. The master control unit is provided with a grid-connected control cabinet, the grid-connected control cabinet is fixedly connected with the master control unit, the high-voltage mobile generator set and the low-voltage mobile generator set are fixedly provided with output control cabinets, and the grid-connected control cabinets are in wireless communication connection with the output control cabinets. The master control unit is provided with a grid-connected control cabinet, other low-voltage mobile motor sets or high-voltage mobile generator sets in a grid-connected system are provided with output control cabinets, the grid-connected control cabinet is in wireless communication connection with a control cabinet at the outlet, and the master control unit is in wireless communication connection with the other low-voltage mobile motor sets or high-voltage mobile generator sets in the grid-connected system, so that the master control unit can perform signal control on the low-voltage mobile motor sets or the high-voltage mobile generator sets in the grid-connected system, the master control unit can dynamically control the working conditions of all the mobile generator sets in a power supply system, the mobile generator sets can bear the impact force of load change, and the stability and the reliability of the power supply system can be improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a mobile generator grid-connected system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a general control unit provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a high-voltage mobile generator set provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a low-voltage mobile generator set provided by an embodiment of the application;
fig. 5 is a schematic flow chart of a method for constructing a grid-connected system of a mobile generator according to an embodiment of the present application.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the corresponding claims (the claimed technology) and their equivalents. It should be noted that the embodiments provided in the present invention can be combined with each other without contradiction.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The following detailed description is to be read in connection with the drawings and the detailed description.
In an alternative embodiment of the present application, please refer to fig. 1, where fig. 1 is a schematic structural diagram of a mobile generator grid-connected system provided in the present application. The mobile generator grid-connected system of the embodiment comprises: the general control unit 100 is connected with the high-voltage line 200 or the low-voltage line 300. In this embodiment, a mobile generator grid-connected system is specifically described by taking an example that the mobile generator grid-connected system includes two low-voltage lines 300, one high-voltage mobile generator set 400 and two low-voltage mobile generator sets 500, and the low-voltage lines 300 are respectively connected with two loads 600.
In this embodiment, the output voltage levels of the high-voltage line 200 or the low-voltage line 300 connected to the master control unit 100 are the same as those of the master control unit 100. In this embodiment, the voltage levels output by the high-voltage line 200 and the master control unit 100 are specifically the same, that is, the master control unit 100 is connected to the high-voltage line 200. It should be noted that in other embodiments, the master control unit 100 may also be connected to the low voltage line 300, that is, the output voltage levels of the low voltage line 300 and the master control unit 100 are the same.
In this embodiment, the high-voltage mobile generator set 400 is connected to the high-voltage line 200, the low-voltage mobile generator set 500 is connected to the low-voltage line 300, and the low-voltage line 300 is naturally communicated with the high-voltage line 200 through the transformer 700.
The load power of the low-voltage line 300 is balanced and adjusted with the load power of the high-voltage line 200 through a transformer 700; if the sum of the output power of all the low-voltage mobile generator sets 500 is smaller than the load of the low-voltage line 300 in the node of the low-voltage mobile generator set 500 and the sum of the output power of all the high-voltage mobile generator sets 400 is larger than the load in the node of the high-voltage mobile generator set 400, the load is transferred from the high-voltage line to the low-voltage line 300 through the transformer 700; otherwise, if the sum of the output power of all the low-voltage mobile generator sets 500 is greater than the load of the low-voltage line in the node of the low-voltage mobile generator set 500, the load is transferred from the low-voltage line 300 to the high-voltage line 200 through the transformer 700. That is, when the power generation energy of the high voltage mobile generator set 400 or the low voltage mobile generator set 500 at the node exceeds the consumption of the load 600 at the node, the transformer 700 transfers the excess energy to the node where the power generation energy does not satisfy the load 600, and the high voltage mobile generator set 400 is transmitted to the node where another high voltage mobile generator set 400 is located through a high voltage line and then transmitted to the user through the transformer 700, so that the power supply system is in a dynamic balance state.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a general control unit 100 provided in the present application. The master control unit 100 is provided with a grid-connected control cabinet 102, the grid-connected control cabinet 102 is fixedly connected with the master control unit 100, the grid-connected control cabinet 102 is fixedly assembled in an electric cabin of the master control unit 100, a controller 103 is arranged in the grid-connected control cabinet 102, and the controller 103 is fixedly connected with the grid-connected control cabinet 102.
Optionally, the controller 103 in this embodiment is a controller with a communication function added on the basis of a tripartite MICROPANEL-31 controller or a khaki GU641B controller.
Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of a high-voltage mobile generator set 400 provided in the present application, and fig. 4 is a schematic structural diagram of a low-voltage mobile generator set 500 provided in the present application. In this embodiment, the output control cabinet 410 is fixedly assembled on both the high-voltage mobile generator set 400 and the low-voltage mobile generator set 500, and the grid-connected control cabinet 102 is in wireless communication connection with the output control cabinet 410. Any one high-voltage mobile generator set 400 and any one low-voltage mobile generator set 500 are both provided with a communicator 420, the communicator 420 is fixedly arranged in the output control cabinet 410, and the communicator 420 is in signal connection with the controller 103. The output control cabinet 410 is also provided with a synchronization checking module 430 inside, and the synchronization checking module 430 is fixedly assembled in the output control cabinet 410. A check period module 430 located within the same output control cabinet 410 is electrically connected to the communicator 420.
Optionally, the communicator 420 in this embodiment may be a wireless transmission device such as a four-letter LTE cat.1 wireless data transmission terminal F2C16 or a tokyo-top W310.
In this embodiment, any one high-voltage mobile generator set 400 is provided with a voltage transformer 501, the voltage transformer 501 is fixedly assembled in the output control cabinet 410, and the voltage transformer 501 located in the same output control cabinet 410 is electrically connected with the communicator 420. It should be noted that, the high voltage mobile generator set 400 and the low voltage mobile generator set 500 in this embodiment are improvements made based on the existing mobile generator set, the existing mobile generator set itself has a sensor for collecting operation information of the mobile generator set, for the low voltage mobile generator set 500 of this embodiment, the generator set itself sensor is used for collecting operation information of the generator set, for the high voltage mobile generator set 400 of this embodiment, since the cost for collecting operation information using its own sensor is high, in this embodiment, a voltage transformer 501 is arranged in the high voltage mobile generator set 400 for measuring operation information of the high voltage mobile generator set 400, and thus, the comprehensive cost of purchase, maintenance, measurement and the like can be reduced.
In the mobile power generator grid-connected system, the controller 103 in the grid-connected control cabinet 102 of the master control unit 100 is connected with the communicators 420 in the high-voltage mobile power generator set 400 and the low-voltage mobile power generator set 500, so that the master control unit 100 can realize point-to-point information interaction with the high-voltage mobile power generator set 400 and the low-voltage mobile power generator set 500 in real time, and transmission of operation information and control commands is realized, thereby realizing that the whole mobile power generation grid-connected system is controlled by the master control unit 100 to form dynamic balance, and ensuring that the mobile power generation grid-connected system has higher stability and reliability.
In an alternative embodiment of the present application, the cabinet of the grid-connected control cabinet 102 is an elastic retractable cabinet. In the current power supply system, only the controller 103 and the communicator 420 capable of controlling the current high-voltage mobile generator set 400 and the current low-voltage mobile generator set 500 are arranged in the grid-connected control cabinet 102, when the power supply system is upgraded or improved to increase the high-voltage mobile generator set 400 or the low-voltage mobile generator set 500, and the size or the number of the controller 103 and the communicator 420 for controlling the high-voltage mobile generator set 400 and the low-voltage mobile generator set 500 is increased, a new grid-connected control cabinet 102 does not need to be installed again, only the original method for stretching the cabinet body of the grid-connected control cabinet 102 is needed, the access and the control of the high-voltage mobile generator set 400 or the low-voltage mobile generator set 500 can be conveniently expanded, and the initial investment of the grid-connected power supply system is more economic.
In this embodiment, a method for constructing the grid-connected system of the mobile generator is exemplarily given, please refer to fig. 5, and fig. 5 is a schematic flow diagram of the method for constructing the grid-connected system of the mobile generator according to the embodiment of the present application. The construction method of the grid-connected system of the mobile generator in the embodiment comprises the following steps:
s101, a mobile generator networking group is obtained, wherein the mobile generator networking group comprises a plurality of mobile generator sets, and the plurality of mobile generator sets comprise at least one high-voltage mobile generator set and at least one low-voltage mobile generator set. The number of the high-voltage mobile generator sets or the low-voltage mobile generator sets in the mobile generator networking group can be comprehensively determined according to factors such as the distribution structure of loads in the power supply system, the environment for parking the mobile generator cars, the resources of the generator sets and the like. For example, the access of a high-voltage line is convenient, and the number of high-voltage mobile generator sets is correspondingly increased so as to meet the requirements of safety and convenience in inspection, oiling and maintenance during power generation.
Optionally, the plurality of mobile generator sets includes at least two high voltage mobile generator sets and at least two low voltage mobile generator sets.
S102, selecting one mobile generator set from the mobile generator networking group as a master control set, and taking the rest mobile generator sets as target generator sets.
In this embodiment, selecting a mobile generator set from the mobile generator networking group as a master control set includes:
if only one mobile generator set is available in the mobile generator networking group corresponding to the maximum power, the mobile generator set corresponding to the maximum power is set as a master control set. The larger the power is, the larger the influence on the circuit is, the optimal control of the total control unit on the whole power supply system can be realized by selecting the mobile generator set with the maximum power as the total control unit, and the impact on the mobile generator grid-connected power supply system caused by sudden load addition or sudden load reduction in the power supply system can be better borne.
If there are multiple mobile generator sets corresponding to the maximum power in the mobile generator networking group, one mobile generator set with the lowest output voltage in the mobile generator sets corresponding to the maximum power is set as the master control set, so that the distance of safety fences near the sets is reduced, inspection of field maintenance personnel and various manual operations required by the field are facilitated, optimal control of the master control set is realized, and the risk coefficient of the master control set can be reduced.
S103, setting the master control unit to operate at constant voltage, and setting the target generator unit to operate at constant power. The master control unit is set to operate at a constant voltage, and the output power of the master control unit can be correspondingly changed when the load in the power supply system is suddenly increased or reduced.
And S104, installing a grid-connected control cabinet in the master control unit. For convenience of repair and maintenance, a certain space is reserved inside the mobile generator set, and the grid-connected control cabinet can be placed in the reserved space inside the mobile generator set.
And S105, the grid-connected control cabinet performs point-to-point communication with each mobile generator set in real time, collects the operation information of each mobile generator set in the mobile generator set network group, analyzes and calculates the operation information, and sends a control command to a target generator set according to a calculation result, wherein the grid-connected control cabinet can send the control command to at least one target generator set.
Optionally, in order to make the position of the mobile generator set more flexible, the point-to-point communication of the embodiment adopts wireless communication. And a wireless communication function is adopted to temporarily form a communication virtual network by the grid-connected control cabinet and each mobile generator set, and the grid-connected control cabinet and each mobile generator set only carry out internal communication in the virtual network to complete the collection of the operation information and the sending of the control command.
The output power of the master control unit bears the sudden change of the load, and in order to enable the master control unit to be capable of adapting to the sudden increase or sudden decrease of the load in the power supply system to the maximum extent, the master control unit is generally set to be the median of the rated power of the master control unit. When the load in the power supply system is suddenly increased or decreased, the master control unit automatically or manually controls the working condition of the target generator set through the grid-connected controller, so that the output power of the target generator set is adjusted, and the fact that the output power of the master control unit is close to the median of the rated power when the master control unit actually works is guaranteed.
And S106, the target generator set executes corresponding command operation according to the control command.
The target generator set executes corresponding command operation according to the control command, and the command operation comprises the following steps:
and the target generator set identifies the control command, if the control command is a parallel operation command, the nodes corresponding to the target mobile generator set and the target power grid are checked and synchronized, and if the check period reaches the standard, the target generator set is connected to the target power grid through the nodes in a parallel mode. And if the control command is a disconnection command, disconnecting the target generator set from the target power grid. And if the control command is an output power adjusting command, adjusting the output power of the target generator set to be 4% -6% of the rated power of the target generator set according to the output power, and operating at constant power according to the adjusted output power.
Specifically, when the three parameters of the frequency, the voltage and the phase of the target mobile generator set are completely consistent with the frequency, the voltage and the phase of the target power grid, the detection synchronization period reaches the standard.
The method comprises the steps of firstly obtaining a mobile generator networking group, then selecting one mobile generator set from the mobile generator networking group as a master control set, using the other mobile generator sets as target generator sets, then setting the master control set to operate at constant voltage, setting the target generator set to operate at constant power, and then installing a grid-connected control cabinet in the master control set, so that the grid-connected control cabinet can carry out point-to-point communication with each mobile generator set in real time, collecting operation information of each mobile generator set in the mobile generator networking group, analyzing and calculating the operation information, and sending a control command to the target generator set according to a calculation result, thereby realizing the dynamic control of the working conditions of all the mobile generator sets in a power supply system by the master control set, meeting the actual power consumption and coping with the condition of sudden load increase or sudden load decrease in the power supply system, further improving the stability and reliability of the power supply system, and improving the reliability of the power supply system.
Optionally, the operation information includes electrical parameters and unit alarm information, where the unit alarm information includes an emergency alarm and a non-emergency alarm, and the grid-connected control cabinet preferentially communicates with the mobile generator unit corresponding to the emergency alarm information.
Optionally, the electrical parameters comprise at least voltage, frequency, phase and phase sequence. Specifically, the phase sequence is compared with a special mark of the generator set manually through a special mark in the line, and then is checked and determined by using a phase sequence tester, wherein the phase sequence tester can be used as a portable special instrument and carried by maintenance personnel for manual operation, and can also be used as a matching instrument of the generator set, and automatic testing is performed before switching on in each grid-connected operation.
Optionally, the control command is a parallel command, a split command, an output power adjustment command, or a false alarm mask command. Specifically, the parallel operation command is used for controlling a mobile generator set which is not parallel operated to be connected to a power supply system; the splitting command is used for controlling the paralleled mobile generator set to exit from the power supply system; the output power adjusting command is used for controlling the paralleled mobile generator set to adjust the output power of the paralleled mobile generator set so as to achieve the purpose of adjusting the output power of the master control set; and the false alarm shielding command is used for sending alarm information to the master control unit when no problem or tiny problem occurs in the parallel mobile generator set to influence the continuous operation, and controlling the alarm information to stop sending.
It should be noted that the control command of the present embodiment is not limited to the parallel operation command, the splitting command, the output power adjustment command, or the false alarm mask command, and may be other commands.
In order to prevent the target generator set from influencing a power supply system due to overlarge primary output power adjustment, the target generator set adjusts the output power of the target generator set to be 4% -6% of the rated power of the target generator set according to the output power, and 5% is preferred in the embodiment. When the load changes, if the target generator set is required to adjust the output power of the target generator set to be more than 5% of the rated power of the target generator set according to the output power, the target generator set can be adjusted for many times. For example, if the target generator set is required to adjust the output power of the target generator set to be 10% of the rated power of the target generator set according to the output power so as to stabilize the master control set, the target generator set can be adjusted twice, and 5% of the target generator set is adjusted each time. Optionally, after each adjustment of the target generator set is completed, waiting for t seconds for the next adjustment, wherein the value range of t is 2-5 seconds, and the master control unit can wait for whether the target generator set sends an alarm message or not within t seconds.
In this embodiment, the difference between the maximum error and the minimum error of each target generator set for adjusting the output power of the target generator set is less than 5%. Due to the problems of service life, service environment, circuit loss and the like of the target generator set, the adjustment linearity of the target generator set may deviate, for example, when the output power of the target generator set is 50%, the adjustment precision is high; when the output power of the target generator set is 80%, the adjusting precision is biased to be negative, namely, the adjusting precision is actually adjusted by 4% when a command of adjusting 5% is executed; when the output power of the target generator set is 20%, the adjusting precision is more positive, namely, the adjusting precision is actually adjusted by 6% when an adjusting command is executed by 5%; when the maximum deviation of the output power of each target generator set is adjusted, namely the maximum positive deviation minus the maximum negative deviation is not more than 5%, the adjustment precision of the system is qualified by default, and otherwise, the function needs to be re-set. According to the grid-connected method of the mobile generator, the stability and the reliability of the power supply system are improved, and meanwhile the feasibility of the power supply system established by the method can be guaranteed.
In this embodiment, a process of constructing a grid-connected system for power generation and dynamic adjustment by using the method for constructing a grid-connected system for a mobile power generator according to this embodiment when a 10KV line has a power failure for 10 hours because a certain substation needs to be repaired due to a power failure.
In the embodiment, the line load is 6 2500KW transformers, wherein 3 transformers are in the factory area and 3 transformers are in the residential area, and the average load is 80%. The obtained mobile generator networking group comprises 6 mobile generator sets, wherein 2 mobile generator sets are 400V/3000KW, the number of the current grid-connected power generation is No. 1 and No. 2 sets, 2 mobile generator sets are 10KV/3000KW, the number of the current grid-connected power generation is No. 3 and No. 4, and the number of the current grid-connected power generation is No. 2 and No. 10KV/1600KW, the number of the current grid-connected power generation is No. 5 and No. 6, and the specific grid-connected power generation and dynamic adjustment processes are as follows:
(1) And selecting the No. 1 mobile generator set as a master control set from the mobile generator networking group. The No. 1 mobile generator set is a maximum power mobile generator set with the lowest output voltage. And the rest, no. 2-6, are target generator sets. Then, the No. 1 mobile generator set is set to operate at constant voltage, and the No. 2-6 mobile generator sets operate at constant power. And a grid-connected control cabinet is arranged in the No. 1 mobile generator set. It should be noted that, the system calculation is performed before the number 1 mobile generator set is set to operate at a constant voltage and the number 2 to 6 mobile generator sets operate at a constant power, because the number 1 mobile generator set is the total control set, in order to ensure that the number 1 mobile generator set can face the situation of sudden increase and sudden decrease of the load, the power of the number 1 mobile generator set is calculated according to half 1500KW, and the load of the number 2 to 6 mobile generator sets is calculated according to 80%, the total power of the mobile generator grid-connected system of the application is 1500+3000 + 3+1600 + 2=13700kw, the load is 2500 + 6 + 80% =12000KVA, and the load rate is 12000/13700=87.6%. Then the No. 2-6 mobile generator sets are operated at the constant power of 88% of the upper power limit of the mobile generator sets.
(2) And (3) formally stopping power supply at 8 am, starting 7 hours and 50 minutes to start the mobile generator set one by one and connecting the mobile generator set with the power grid in order to ensure that a client does not stop power supply, and stopping the commercial power supply after all loads are transferred to the mobile generator set and the set stably runs. And the No. 1 mobile generator set receives the running information of the No. 2 to No. 6 mobile generator sets in real time and sends a control command to the No. 2 to No. 6 mobile generator sets.
(3) After the mains supply is powered off, the number 2-6 mobile generator sets are observed from the master control unit to normally work in a constant power state according to the setting.
(4) The number 1 master control unit observes that the actual load of the master control unit is too light and only lingers up and down by 25%, and in order to ensure the load impact resistance of the master control unit, a master control operator calculates to reduce the output power regulation command of 5% to all target high-voltage or low-voltage mobile generator units in a group transmission load rate.
(5) After 1 minute, observation and comparison are carried out, the constant-power No. 2-6 mobile unit operates at 83% load rate, the No. 1 master control unit loiters up and down by 50%, and the system operates in a relatively stable state.
(6) At noon, workers eat food, most of equipment in a factory is stopped, the consumption of civil air conditioners is increased, the load is reduced as a whole, the load of the No. 1 master control unit is continuously reduced from 50%, in order to keep stable, the master control unit is adjusted to an automatic state, control commands are continuously sent to No. 2-6 mobile generator units in a group mode at a load rate of reducing power by 5% each time, when the load of a system is relatively stable, the load rate of No. 2-6 constant power mobile generator units is 53%, and the load rate of the master control unit is loitering at 48%.
(7) 30 minutes in the afternoon, the factory machines start successively, the main control unit operates in an automatic state, control commands are sent to No. 2-6 mobile generator units continuously at a load rate of 5% of the raised power each time, when the load rate of the system is relatively stable, the load rate of the constant power unit reaches 88%, the load rate of the main control unit is about 55%, and the whole power generation system enters a second load peak. At the moment, the master control unit is automatically switched into manual operation, comprehensive judgment is carried out according to the temperature condition of unit operation, the load rate is not averagely adjusted, and manual fine adjustment is carried out according to the operation condition of the unit.
(8) After the afternoon load peak, the overall load rate begins to drop, at which point the transition to the auto-adjusting load state continues.
(9) The method comprises the steps that mains supply is incoming at right time at 18 pm, the same period needs to be strictly checked, when the mains supply is switched on, the phase difference is controlled to be below 5 degrees, then the load of a mobile generator set is gradually transferred to the mains supply, when the load rate of the mobile generator set is not more than 10%, a load switch of the mobile generator set is switched off, and then the mobile generator set stops. The process of grid-connected power generation and dynamic adjustment is completed by adopting the mobile generator grid-connected method.
In the grid-connected power generation and dynamic adjustment process, the master control unit can collect the operation information of other target high-voltage mobile generator sets and low-voltage mobile generator sets in real time and calculate according to the operation information, the calculation result sends control information to the other target high-voltage mobile generator sets and the low-voltage mobile generator sets, the load ratios of the master control unit and the other target high-voltage mobile generator sets and the low-voltage mobile generator sets are dynamically adjusted, the grid-connected mobile power generation system is guaranteed to run stably, and the reliability of the grid-connected system is improved.
To sum up, the utility model provides a mobile generator grid-connected system has realized following beneficial effect at least:
the utility model provides a pair of mobile generator system that is incorporated into power networks, the communicator among controller in the control cabinet that is incorporated into power networks of total control unit and high pressure mobile generator set and the low pressure mobile generator set is connected, can realize total control unit in real time and high pressure mobile generator set and low pressure mobile generator set's point-to-point information interaction, realize running information and control command transmission, thereby realize forming dynamic balance by the whole mobile power generation system that is incorporated into power networks of total control unit control, make mobile power generation system that is incorporated into power networks have higher stability and reliability.
Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (8)
1. A mobile generator grid-connected system is characterized by comprising: the system comprises a master control unit, a high-voltage line, at least one low-voltage line, at least one high-voltage mobile generator set and at least one low-voltage mobile generator set;
the master control unit is connected with the high-voltage line or the low-voltage line;
the high-voltage mobile generator set is connected with the high-voltage line, and the low-voltage mobile generator set is connected with the low-voltage line;
the low-voltage line is connected with the high-voltage line through a transformer;
the master control unit is provided with a grid-connected control cabinet, the grid-connected control cabinet is fixedly connected with the master control unit, the high-voltage mobile generator set and the low-voltage mobile generator set are fixedly provided with output control cabinets, and the grid-connected control cabinets are in wireless communication connection with the output control cabinets.
2. The mobile generator grid-connected system according to claim 1, wherein the output voltage levels of the high-voltage line or the low-voltage line connected with the main control unit and the main control unit are the same.
3. The mobile generator grid-connected system according to claim 2, wherein the grid-connected control cabinet is fixedly assembled to an electric cabin of the main control unit.
4. The grid-connected system of the mobile power generator as claimed in claim 3, wherein a controller is arranged in the grid-connected control cabinet, and the controller is fixedly connected with the grid-connected control cabinet.
5. The mobile generator grid-connected system of claim 4, wherein any one of the high-voltage mobile generator sets and any one of the low-voltage mobile generator sets are provided with a communicator, the communicator is fixedly mounted in the output control cabinet, and the communicator is in signal connection with the controller.
6. The mobile generator grid-connected system according to claim 5, wherein a synchronization detection module is further arranged inside the output control cabinet, and the synchronization detection module is fixedly assembled in the output control cabinet;
and the synchronization detection module and the communicator which are positioned in the same output control cabinet are electrically connected.
7. The mobile generator grid-connected system according to claim 6, wherein any one of the high-voltage mobile generator sets is provided with a voltage transformer, and the voltage transformer is fixedly assembled in the output control cabinet;
and the voltage transformers positioned in the same output control cabinet are electrically connected with the communicator.
8. The mobile generator grid-connected system according to claim 7, wherein the cabinet body of the grid-connected control cabinet is an elastic telescopic cabinet body.
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| CN202222211730.9U CN217984554U (en) | 2022-08-22 | 2022-08-22 | Mobile generator grid-connected system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115189411A (en) * | 2022-08-22 | 2022-10-14 | 北京动科瑞利文科技有限公司 | A method and system for connecting a mobile generator to the grid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115189411A (en) * | 2022-08-22 | 2022-10-14 | 北京动科瑞利文科技有限公司 | A method and system for connecting a mobile generator to the grid |
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